1) an expression used to discribe a particularily harsh insult (a burn)
2) an expression used when someone had a negative past experience
3) when an extreme amount of heat is applied to something long enough to alter it

1) a series of offensive words, used in an undesireable situation.
2) a series of offensive words, used only to shock or disturb those around you.
3) an insulting request, translates to "have sex with this piece of poo, you who has a vagina in the place of their rectum."